Subject: long-bodied yellow-orange fly
Geographic location of the bug: Buffalo NY, USA
Time: 04:34 PM EDT
Your letter to the bugman: Hi. I’ve never seen anything like these before. Dozens of them hovering over a patch of leaf litter with white fungus in a heavily shaded corner of our yard. They move around constantly and were not seen to land. Body length about 2.5cm.
How you want your letter signed: JR
These yellow flies reminded Daniel of some flies he saw in Ohio several times in June that he believed were Soldier Flies in the family Stratiomyidae, and a web search led to Red Worm Composting and an article entitled Yellow Soldier Flies Revisited where it states: “As if this wasn’t cool enough, today when I walked by a bag of (compostable) used cat litter material – waiting to get added to my new litter vermicomposting system – I noticed a bunch of these large, yellow flies hovering around the bag.” Eventually Dr. Stephen Marshal, at the University of Guelph identified them as probably Ptecticus trivittatus. We located a matching image on BugGuide.
Thanks very much for the prompt response. Yes, that’s a match!
Much appreciated. Best wishes,